This document describes language immersion programs offered at El Cantalar, a nature center located in the Sierras de Cazorla Natural Park in Spain. The programs aim to teach English or Spanish to school groups through outdoor activities and contact with nature. Students engage in nature walks, workshops on ecology and sustainability, outdoor sports, and evening activities - all with a focus on practical language use and environmental education. El Cantalar works with each school group to create a customized bilingual program tailored to the students' abilities and interests.